GEMINI (Apr2004) Gemini IRAF package v1.6 GEMINI (Apr2004)
Release date: April 19, 2004
This document describes the revisions relative to the Gemini IRAF package v1.5.
User upgrading from v1.4 are encouraged to also read gemini_v15_rev.txt.
The upgrade to Gemini IRAF package is strongly recommended, as several bugs have
been fixed since v1.5.
This version of the Gemini IRAF package requires IRAF V2.12.2.
PRIMARY REVISIONS:
1) New functionalities/parameters.
In particular, the GMOS package now supports GMOS-South IFU data. Several
changes have been applied to the GMOS IFU tasks (GF*). Please read the
details given below carefully.
2) New or revised supporting data (GMOS package)
3) Bug fixes.
Users of flatfields produced by GSFLAT with the parameter 'fl_detec' set to
'yes' should read section 3-(i) below.
DETAILS OF THE REVISIONS:
1) New functionalities/parameters
(i) GMOS South IFU support:
Support for the reduction of IFU data from GMOS-South is now available.
Significant changes to the GMOS IFU tasks (GF* tasks) have been made to
the code but also the parameter files. The user is advised to 'unlearn'
the GF* tasks to insured that the new parameters and the new default
values are picked up. Please read the help pages for more information
on the new functionalities and parameters.
gmos.gfapsum:
- New parameter:
* apertures
- New default value:
* expr = "default"
gmos.gfdisplay:
- New default values:
* config = "default"
* deadfib = "default"
- New functionality:
The configuration files ('config' and 'deadfib') can be
automatically obtained from the MDF. This is the default
behaviour.
gmos.gfextract:
- New parameters:
* fl_gnsskysub
* fl_fixnc
* fl_novlap
* perovlap
- Added support for two filters
gmos.gfreduce:
- New parameters:
* fl_nodshuffle
* fl_gnsskysub
* fl_fixnc
* fl_novlap
* perovlap
- New default values:
* expr = "default"
* observatory = "default"
gmos.gfskysub:
- New parameter:
* apertures
- New default value:
* expr = "default"
(ii) Other changes
gmos.girmfringe:
- New default value for the 'scale' parameter. The auto-scale
algorithm is now the default.
gmos.gfextract:
gmos.gsappwave:
gmos.gscut:
- Added support for the simultaneous use of two filters in the beam.
2) New or revised supporting data for GMOS
gmos/data/GMOSfilters.dat:
- Added RG780
gmos/data/gmosamps.dat:
- Revised values for gain and ron
gmos/data/gnifu_slitb_mdf.fits
gmos/data/gnifu_slitr_mdf.fits
gmos/data/gnifu_slits_mdf.fits
- New format with 'ldisplay' columns.
gmos/data/gsifu_ns_slitb_mdf.fits (New)
gmos/data/gsifu_ns_slitr_mdf.fits (New)
gmos/data/gsifu_ns_slits_mdf.fits (New)
gmos/data/gsifu_slitb_mdf.fits (New)
gmos/data/gsifu_slitr_mdf.fits (New)
gmos/data/gsifu_slits_mdf.fits (New)
gmos/data/gsifu_slitb_mdf_2003nov.fits (New)
gmos/data/gsifu_slitr_mdf_2003nov.fits (New)
gmos/data/gsifu_slits_mdf_2003nov.vits (New)
- New data files for GMOS-South IFU support.
gmos/data/RG780.dat (New)
- GMOS RG780 filter info
See also gmos/data/README for a complete listing of the files in the
directory gmos/data.
3) Bug fixes
(i) Bug fixes affecting the science results
gmos.gsreduce:
- For the case of 3 science extension (i.e. non-gmosaiced) flatfield
produced by GSFLAT with 'fl_detec=yes', a logical problem was found
in which the gain was applied twice. This is now fixed.
(ii) Improved used of the FITS kernel cache
IRAF's FITS kernel caches header information based on FITS file name.
Because of this caching, the re-use of temporary file names can cause
problems, often leading to segmentation faults.
All the tasks in the Gemini IRAF package have been reviewed and made
"FITS kernel cache"-safe.
(iii) Other bug fixes
Various bug fixes have been made all over the package (mostly GMOS
tasks). Below is a truncated list summarizing a few of the most relevant
ones from a user's point of view.
gemtools.gemarith:
- Fixed a problem caused by more than one instance of "PREPARE" string
in header.
gmos.gdisplay:
- For reduce data, uses the header's GAINORIG value rather than GAIN.
gmos.gfreduce:
- Fixed an "Unknown parameter" error.
gmos.giflat:
- Fixed a bug causing a crash when the inputs are not gireduced and
the user still do not want the images biased or trimmed.
gmos.gmosaic:
- Force the use of 'proto.fixpix' rather than 'nmisc.fixpix'.
'nmisc.fixpix' was causing segmentation faults on some systems.
- Improved rotations and Xoffsets for GMOS-South CCDs.
gmos.gsreduce:
- Type coercion bugs fixed.
- Also see item 3-(i) above.
midir.tbackground:
- Fundamental bug fixed: the previous version could not work for any
image where one or more frames was automatically flagged as bad.